diff --git a/BTCPayServer/Controllers/InvoiceController.UI.cs b/BTCPayServer/Controllers/InvoiceController.UI.cs
index e9e7bcffc..8ea206191 100644
--- a/BTCPayServer/Controllers/InvoiceController.UI.cs
+++ b/BTCPayServer/Controllers/InvoiceController.UI.cs
@@ -51,7 +51,7 @@ namespace BTCPayServer.Controllers
                 StoreName = store.StoreName,
                 StoreLink = Url.Action(nameof(StoresController.UpdateStore), "Stores", new { storeId = store.Id }),
                 Id = invoice.Id,
-                Status = invoice.Status,
+                State = invoice.GetInvoiceState().ToString(),
                 TransactionSpeed = invoice.SpeedPolicy == SpeedPolicy.HighSpeed ? "high" :
                                    invoice.SpeedPolicy == SpeedPolicy.MediumSpeed ? "medium" :
                                    invoice.SpeedPolicy == SpeedPolicy.LowMediumSpeed ? "low-medium" :
@@ -301,7 +301,9 @@ namespace BTCPayServer.Controllers
                                     throw new NotSupportedException(),
                 TxCount = accounting.TxRequired,
                 BtcPaid = accounting.Paid.ToString(),
-                Status = invoice.Status,
+#pragma warning disable CS0618 // Type or member is obsolete
+                Status = invoice.StatusString,
+#pragma warning restore CS0618 // Type or member is obsolete
                 NetworkFee = paymentMethodDetails.GetTxFee(),
                 IsMultiCurrency = invoice.GetPayments().Select(p => p.GetPaymentMethodId()).Concat(new[] { paymentMethod.GetId() }).Distinct().Count() > 1,
                 ChangellyEnabled = changelly != null,
@@ -373,7 +375,7 @@ namespace BTCPayServer.Controllers
             if (!HttpContext.WebSockets.IsWebSocketRequest)
                 return NotFound();
             var invoice = await _InvoiceRepository.GetInvoice(invoiceId);
-            if (invoice == null || invoice.Status == "complete" || invoice.Status == "invalid" || invoice.Status == "expired")
+            if (invoice == null || invoice.Status == InvoiceStatus.Complete || invoice.Status ==  InvoiceStatus.Invalid || invoice.Status == InvoiceStatus.Expired)
                 return NotFound();
             var webSocket = await HttpContext.WebSockets.AcceptWebSocketAsync();
             CompositeDisposable leases = new CompositeDisposable();
@@ -444,7 +446,7 @@ namespace BTCPayServer.Controllers
                 model.Invoices.Add(new InvoiceModel()
                 {
                     Status = state.ToString(),
-                    ShowCheckout = invoice.Status == "new",
+                    ShowCheckout = invoice.Status == InvoiceStatus.New,
                     Date = invoice.InvoiceTime,
                     InvoiceId = invoice.Id,
                     OrderId = invoice.OrderId ?? string.Empty,
diff --git a/BTCPayServer/Controllers/InvoiceController.cs b/BTCPayServer/Controllers/InvoiceController.cs
index 0ad9f1b93..e7a0266eb 100644
--- a/BTCPayServer/Controllers/InvoiceController.cs
+++ b/BTCPayServer/Controllers/InvoiceController.cs
@@ -99,7 +99,7 @@ namespace BTCPayServer.Controllers
             if (!Uri.IsWellFormedUriString(entity.RedirectURL, UriKind.Absolute))
                 entity.RedirectURL = null;
 
-            entity.Status = "new";
+            entity.Status = InvoiceStatus.New;
             entity.SpeedPolicy = ParseSpeedPolicy(invoice.TransactionSpeed, store.SpeedPolicy);
 
             HashSet<CurrencyPair> currencyPairsToFetch = new HashSet<CurrencyPair>();
diff --git a/BTCPayServer/Data/InvoiceData.cs b/BTCPayServer/Data/InvoiceData.cs
index 65923631a..4914c9e7e 100644
--- a/BTCPayServer/Data/InvoiceData.cs
+++ b/BTCPayServer/Data/InvoiceData.cs
@@ -84,7 +84,7 @@ namespace BTCPayServer.Data
 
         public Services.Invoices.InvoiceState GetInvoiceState()
         {
-            return new Services.Invoices.InvoiceState() { Status = Status, ExceptionStatus = ExceptionStatus };
+            return new Services.Invoices.InvoiceState(Status, ExceptionStatus);
         }
     }
 }
diff --git a/BTCPayServer/Events/InvoiceDataChangedEvent.cs b/BTCPayServer/Events/InvoiceDataChangedEvent.cs
index 77a9cf44a..3ef12e6a0 100644
--- a/BTCPayServer/Events/InvoiceDataChangedEvent.cs
+++ b/BTCPayServer/Events/InvoiceDataChangedEvent.cs
@@ -11,23 +11,14 @@ namespace BTCPayServer.Events
         public InvoiceDataChangedEvent(InvoiceEntity invoice)
         {
             InvoiceId = invoice.Id;
-            Status = invoice.Status;
-            ExceptionStatus = invoice.ExceptionStatus;
+            State = invoice.GetInvoiceState();
         }
-        public string InvoiceId { get; set; }
-        public string Status { get; internal set; }
-        public string ExceptionStatus { get; internal set; }
+        public string InvoiceId { get; }
+        public InvoiceState State { get; }
 
         public override string ToString()
         {
-            if (string.IsNullOrEmpty(ExceptionStatus) || ExceptionStatus == "false")
-            { 
-                return $"Invoice status is {Status}";
-            }
-            else
-            {
-                return $"Invoice status is {Status} (Exception status: {ExceptionStatus})";
-            }
+            return $"Invoice status is {State}";
         }
     }
 }
diff --git a/BTCPayServer/HostedServices/InvoiceWatcher.cs b/BTCPayServer/HostedServices/InvoiceWatcher.cs
index 4abc0acca..c037a9724 100644
--- a/BTCPayServer/HostedServices/InvoiceWatcher.cs
+++ b/BTCPayServer/HostedServices/InvoiceWatcher.cs
@@ -61,14 +61,14 @@ namespace BTCPayServer.HostedServices
         private async Task UpdateInvoice(UpdateInvoiceContext context)
         {
             var invoice = context.Invoice;
-            if (invoice.Status == "new" && invoice.ExpirationTime < DateTimeOffset.UtcNow)
+            if (invoice.Status == InvoiceStatus.New && invoice.ExpirationTime < DateTimeOffset.UtcNow)
             {
                 context.MarkDirty();
                 await _InvoiceRepository.UnaffectAddress(invoice.Id);
 
                 context.Events.Add(new InvoiceEvent(invoice.EntityToDTO(_NetworkProvider), 1004, "invoice_expired"));
-                invoice.Status = "expired";
-                if(invoice.ExceptionStatus == "paidPartial")
+                invoice.Status = InvoiceStatus.Expired;
+                if(invoice.ExceptionStatus == InvoiceExceptionStatus.PaidPartial)
                     context.Events.Add(new InvoiceEvent(invoice.EntityToDTO(_NetworkProvider), 2000, "invoice_expiredPaidPartial"));
             }
 
@@ -78,57 +78,57 @@ namespace BTCPayServer.HostedServices
             if (paymentMethod == null)
                 return;
             var network = _NetworkProvider.GetNetwork(paymentMethod.GetId().CryptoCode);
-            if (invoice.Status == "new" || invoice.Status == "expired")
+            if (invoice.Status == InvoiceStatus.New || invoice.Status == InvoiceStatus.Expired)
             {
                 if (accounting.Paid >= accounting.MinimumTotalDue)
                 {
-                    if (invoice.Status == "new")
+                    if (invoice.Status == InvoiceStatus.New)
                     {
                         context.Events.Add(new InvoiceEvent(invoice.EntityToDTO(_NetworkProvider), 1003, "invoice_paidInFull"));
-                        invoice.Status = "paid";
-                        invoice.ExceptionStatus = accounting.Paid > accounting.TotalDue ? "paidOver" : null;
+                        invoice.Status = InvoiceStatus.Paid;
+                        invoice.ExceptionStatus = accounting.Paid > accounting.TotalDue ? InvoiceExceptionStatus.PaidOver : InvoiceExceptionStatus.None;
                         await _InvoiceRepository.UnaffectAddress(invoice.Id);
                         context.MarkDirty();
                     }
-                    else if (invoice.Status == "expired" && invoice.ExceptionStatus != "paidLate")
+                    else if (invoice.Status == InvoiceStatus.Expired && invoice.ExceptionStatus != InvoiceExceptionStatus.PaidLate)
                     {
-                        invoice.ExceptionStatus = "paidLate";
+                        invoice.ExceptionStatus = InvoiceExceptionStatus.PaidLate;
                         context.Events.Add(new InvoiceEvent(invoice.EntityToDTO(_NetworkProvider), 1009, "invoice_paidAfterExpiration"));
                         context.MarkDirty();
                     }
                 }
 
-                if (accounting.Paid < accounting.MinimumTotalDue && invoice.GetPayments().Count != 0 && invoice.ExceptionStatus != "paidPartial")
+                if (accounting.Paid < accounting.MinimumTotalDue && invoice.GetPayments().Count != 0 && invoice.ExceptionStatus != InvoiceExceptionStatus.PaidPartial)
                 {
-                        invoice.ExceptionStatus = "paidPartial";
+                        invoice.ExceptionStatus = InvoiceExceptionStatus.PaidPartial;
                         context.MarkDirty();
                 }
             }
 
             // Just make sure RBF did not cancelled a payment
-            if (invoice.Status == "paid")
+            if (invoice.Status == InvoiceStatus.Paid)
             {
-                if (accounting.MinimumTotalDue <= accounting.Paid && accounting.Paid <= accounting.TotalDue && invoice.ExceptionStatus == "paidOver")
+                if (accounting.MinimumTotalDue <= accounting.Paid && accounting.Paid <= accounting.TotalDue && invoice.ExceptionStatus == InvoiceExceptionStatus.PaidOver)
                 {
-                    invoice.ExceptionStatus = null;
+                    invoice.ExceptionStatus = InvoiceExceptionStatus.None;
                     context.MarkDirty();
                 }
 
-                if (accounting.Paid > accounting.TotalDue && invoice.ExceptionStatus != "paidOver")
+                if (accounting.Paid > accounting.TotalDue && invoice.ExceptionStatus != InvoiceExceptionStatus.PaidOver)
                 {
-                    invoice.ExceptionStatus = "paidOver";
+                    invoice.ExceptionStatus = InvoiceExceptionStatus.PaidOver;
                     context.MarkDirty();
                 }
 
                 if (accounting.Paid < accounting.MinimumTotalDue)
                 {
-                    invoice.Status = "new";
-                    invoice.ExceptionStatus = accounting.Paid == Money.Zero ? null : "paidPartial";
+                    invoice.Status = InvoiceStatus.New;
+                    invoice.ExceptionStatus = accounting.Paid == Money.Zero ? InvoiceExceptionStatus.None : InvoiceExceptionStatus.PaidPartial;
                     context.MarkDirty();
                 }
             }
 
-            if (invoice.Status == "paid")
+            if (invoice.Status == InvoiceStatus.Paid)
             {
                 var confirmedAccounting = paymentMethod.Calculate(p => p.GetCryptoPaymentData().PaymentConfirmed(p, invoice.SpeedPolicy, network));
 
@@ -140,25 +140,25 @@ namespace BTCPayServer.HostedServices
                 {
                     await _InvoiceRepository.UnaffectAddress(invoice.Id);
                     context.Events.Add(new InvoiceEvent(invoice.EntityToDTO(_NetworkProvider), 1013, "invoice_failedToConfirm"));
-                    invoice.Status = "invalid";
+                    invoice.Status = InvoiceStatus.Invalid;
                     context.MarkDirty();
                 }
                 else if (confirmedAccounting.Paid >= accounting.MinimumTotalDue)
                 {
                     await _InvoiceRepository.UnaffectAddress(invoice.Id);
                     context.Events.Add(new InvoiceEvent(invoice.EntityToDTO(_NetworkProvider), 1005, "invoice_confirmed"));
-                    invoice.Status = "confirmed";
+                    invoice.Status = InvoiceStatus.Confirmed;
                     context.MarkDirty();
                 }
             }
 
-            if (invoice.Status == "confirmed")
+            if (invoice.Status == InvoiceStatus.Confirmed)
             {
                 var completedAccounting = paymentMethod.Calculate(p => p.GetCryptoPaymentData().PaymentCompleted(p, network));
                 if (completedAccounting.Paid >= accounting.MinimumTotalDue)
                 {
                     context.Events.Add(new InvoiceEvent(invoice.EntityToDTO(_NetworkProvider), 1006, "invoice_completed"));
-                    invoice.Status = "complete";
+                    invoice.Status = InvoiceStatus.Complete;
                     context.MarkDirty();
                 }
             }
@@ -290,7 +290,7 @@ namespace BTCPayServer.HostedServices
                             await UpdateInvoice(updateContext);
                             if (updateContext.Dirty)
                             {
-                                await _InvoiceRepository.UpdateInvoiceStatus(invoice.Id, invoice.Status, invoice.ExceptionStatus);
+                                await _InvoiceRepository.UpdateInvoiceStatus(invoice.Id, invoice.GetInvoiceState());
                                 updateContext.Events.Insert(0, new InvoiceDataChangedEvent(invoice));
                             }
 
@@ -299,8 +299,8 @@ namespace BTCPayServer.HostedServices
                                 _EventAggregator.Publish(evt, evt.GetType());
                             }
 
-                            if (invoice.Status == "complete" ||
-                               ((invoice.Status == "invalid" || invoice.Status == "expired") && invoice.MonitoringExpiration < DateTimeOffset.UtcNow))
+                            if (invoice.Status == InvoiceStatus.Complete ||
+                               ((invoice.Status == InvoiceStatus.Invalid || invoice.Status == InvoiceStatus.Expired) && invoice.MonitoringExpiration < DateTimeOffset.UtcNow))
                             {
                                 if (await _InvoiceRepository.RemovePendingInvoice(invoice.Id))
                                     _EventAggregator.Publish(new InvoiceStopWatchedEvent(invoice.Id));
diff --git a/BTCPayServer/Models/InvoicingModels/InvoiceDetailsModel.cs b/BTCPayServer/Models/InvoicingModels/InvoiceDetailsModel.cs
index 193d20157..be04b907b 100644
--- a/BTCPayServer/Models/InvoicingModels/InvoiceDetailsModel.cs
+++ b/BTCPayServer/Models/InvoicingModels/InvoiceDetailsModel.cs
@@ -81,11 +81,11 @@ namespace BTCPayServer.Models.InvoicingModels
             public string BOLT11 { get; set; }
         }
 
-        public string Status
+        public string State
         {
             get; set;
         }
-        public string StatusException { get; set; }
+        public InvoiceExceptionStatus StatusException { get; set; }
         public DateTimeOffset CreatedDate
         {
             get; set;
diff --git a/BTCPayServer/Services/Invoices/Export/InvoiceExport.cs b/BTCPayServer/Services/Invoices/Export/InvoiceExport.cs
index dad7363fe..f71366ec1 100644
--- a/BTCPayServer/Services/Invoices/Export/InvoiceExport.cs
+++ b/BTCPayServer/Services/Invoices/Export/InvoiceExport.cs
@@ -77,7 +77,9 @@ namespace BTCPayServer.Services.Invoices.Export
                     CreatedDate = invoice.InvoiceTime.UtcDateTime,
                     ExpirationDate = invoice.ExpirationTime.UtcDateTime,
                     MonitoringDate = invoice.MonitoringExpiration.UtcDateTime,
-                    Status = invoice.Status,
+#pragma warning disable CS0618 // Type or member is obsolete
+                    Status = invoice.StatusString,
+#pragma warning restore CS0618 // Type or member is obsolete
                     ItemCode = invoice.ProductInformation?.ItemCode,
                     ItemDesc = invoice.ProductInformation?.ItemDesc,
                     FiatPrice = invoice.ProductInformation?.Price ?? 0,
diff --git a/BTCPayServer/Services/Invoices/InvoiceEntity.cs b/BTCPayServer/Services/Invoices/InvoiceEntity.cs
index b37bf0868..e223f8690 100644
--- a/BTCPayServer/Services/Invoices/InvoiceEntity.cs
+++ b/BTCPayServer/Services/Invoices/InvoiceEntity.cs
@@ -226,15 +226,23 @@ namespace BTCPayServer.Services.Invoices
 #pragma warning restore CS0618
         }
 
-        public string Status
+        [JsonIgnore]
+        public InvoiceStatus Status
         {
             get;
             set;
         }
-        public string ExceptionStatus
+        [JsonProperty(PropertyName = "status")]
+        [Obsolete("Use Status instead")]
+        public string StatusString => InvoiceState.ToString(Status);
+        [JsonIgnore]
+        public InvoiceExceptionStatus ExceptionStatus
         {
             get; set;
         }
+        [JsonProperty(PropertyName = "exceptionStatus")]
+        [Obsolete("Use ExceptionStatus instead")]
+        public string ExceptionStatusString => InvoiceState.ToString(ExceptionStatus);
 
         [Obsolete("Use GetPayments instead")]
         public List<PaymentEntity> Payments
@@ -341,7 +349,10 @@ namespace BTCPayServer.Services.Invoices
                 CurrentTime = DateTimeOffset.UtcNow,
                 InvoiceTime = InvoiceTime,
                 ExpirationTime = ExpirationTime,
-                Status = Status,
+#pragma warning disable CS0618 // Type or member is obsolete
+                Status = StatusString,
+                ExceptionStatus = ExceptionStatus == InvoiceExceptionStatus.None ? new JValue(false) : new JValue(ExceptionStatusString),
+#pragma warning restore CS0618 // Type or member is obsolete
                 Currency = ProductInformation.Currency,
                 Flags = new Flags() { Refundable = Refundable },
                 PaymentSubtotals = new Dictionary<string, long>(),
@@ -447,7 +458,6 @@ namespace BTCPayServer.Services.Invoices
 
             dto.Token = Encoders.Base58.EncodeData(RandomUtils.GetBytes(16)); //No idea what it is useful for
             dto.Guid = Guid.NewGuid().ToString();
-            dto.ExceptionStatus = ExceptionStatus == null ? new JValue(false) : new JValue(ExceptionStatus);
             return dto;
         }
 
@@ -529,38 +539,104 @@ namespace BTCPayServer.Services.Invoices
 
         public InvoiceState GetInvoiceState()
         {
-            return new InvoiceState() { Status = Status, ExceptionStatus = ExceptionStatus };
+            return new InvoiceState(Status, ExceptionStatus);
         }
     }
 
+    public enum InvoiceStatus
+    {
+        New,
+        Paid,
+        Expired,
+        Invalid,
+        Complete,
+        Confirmed
+    }
+    public enum InvoiceExceptionStatus
+    {
+        None,
+        PaidLate,
+        PaidPartial,
+        Marked,
+        Invalid,
+        PaidOver
+    }
     public class InvoiceState
     {
-        public string Status { get; set; }
-        public string ExceptionStatus { get; set; }
+        static Dictionary<string, InvoiceStatus> _StringToInvoiceStatus;
+        static Dictionary<InvoiceStatus, string> _InvoiceStatusToString;
+
+        static Dictionary<string, InvoiceExceptionStatus> _StringToExceptionStatus;
+        static Dictionary<InvoiceExceptionStatus, string> _ExceptionStatusToString;
+
+        static InvoiceState()
+        {
+            _StringToInvoiceStatus = new Dictionary<string, InvoiceStatus>();
+            _StringToInvoiceStatus.Add("paid", InvoiceStatus.Paid);
+            _StringToInvoiceStatus.Add("expired", InvoiceStatus.Expired);
+            _StringToInvoiceStatus.Add("invalid", InvoiceStatus.Invalid);
+            _StringToInvoiceStatus.Add("complete", InvoiceStatus.Complete);
+            _StringToInvoiceStatus.Add("new", InvoiceStatus.New);
+            _StringToInvoiceStatus.Add("confirmed", InvoiceStatus.Confirmed);
+            _InvoiceStatusToString = _StringToInvoiceStatus.ToDictionary(kv => kv.Value, kv => kv.Key);
+
+            _StringToExceptionStatus = new Dictionary<string, InvoiceExceptionStatus>();
+            _StringToExceptionStatus.Add(string.Empty, InvoiceExceptionStatus.None);
+            _StringToExceptionStatus.Add("paidPartial", InvoiceExceptionStatus.PaidPartial);
+            _StringToExceptionStatus.Add("paidLate", InvoiceExceptionStatus.PaidLate);
+            _StringToExceptionStatus.Add("paidOver", InvoiceExceptionStatus.PaidOver);
+            _StringToExceptionStatus.Add("marked", InvoiceExceptionStatus.Marked);
+            _ExceptionStatusToString = _StringToExceptionStatus.ToDictionary(kv => kv.Value, kv => kv.Key);
+            _StringToExceptionStatus.Add("false", InvoiceExceptionStatus.None);
+        }
+        public InvoiceState(string status, string exceptionStatus)
+        {
+            Status = _StringToInvoiceStatus[status];
+            ExceptionStatus = _StringToExceptionStatus[exceptionStatus ?? string.Empty];
+        }
+        public InvoiceState(InvoiceStatus status, InvoiceExceptionStatus exceptionStatus)
+        {
+            Status = status;
+            ExceptionStatus = exceptionStatus;
+        }
+
+        public InvoiceStatus Status { get; }
+        public InvoiceExceptionStatus ExceptionStatus { get; }
+
+        public static string ToString(InvoiceStatus status)
+        {
+            return _InvoiceStatusToString[status];
+        }
+
+        public static string ToString(InvoiceExceptionStatus exceptionStatus)
+        {
+            return _ExceptionStatusToString[exceptionStatus];
+        }
+
         public bool CanMarkComplete()
         {
-            return (Status == "paid") ||
+            return (Status == InvoiceStatus.Paid) ||
 #pragma warning disable CA1305 // Specify IFormatProvider
-                   ((Status == "new" || Status == "expired") && ExceptionStatus?.ToString() == "paidPartial") ||
-                   ((Status == "new" || Status == "expired") && ExceptionStatus?.ToString() == "paidLate") ||
-                   (Status != "complete" && ExceptionStatus?.ToString() == "marked") ||
-                   (Status == "invalid");
+                   ((Status == InvoiceStatus.New || Status == InvoiceStatus.Expired) && ExceptionStatus == InvoiceExceptionStatus.PaidPartial) ||
+                   ((Status == InvoiceStatus.New || Status == InvoiceStatus.Expired) && ExceptionStatus == InvoiceExceptionStatus.PaidLate) ||
+                   (Status != InvoiceStatus.Complete && ExceptionStatus == InvoiceExceptionStatus.Marked) ||
+                   (Status == InvoiceStatus.Invalid);
 #pragma warning restore CA1305 // Specify IFormatProvider
         }
 
         public bool CanMarkInvalid()
         {
-            return (Status == "paid") ||
-                   (Status == "new") ||
+            return (Status == InvoiceStatus.Paid) ||
+                   (Status == InvoiceStatus.New) ||
 #pragma warning disable CA1305 // Specify IFormatProvider
-                   ((Status == "new" || Status == "expired") && ExceptionStatus?.ToString() == "paidPartial") ||
-                   ((Status == "new" || Status == "expired") && ExceptionStatus?.ToString() == "paidLate") ||
-                   (Status != "invalid" && ExceptionStatus?.ToString() == "marked");
+                   ((Status == InvoiceStatus.New || Status == InvoiceStatus.Expired) && ExceptionStatus == InvoiceExceptionStatus.PaidPartial) ||
+                   ((Status == InvoiceStatus.New || Status == InvoiceStatus.Expired) && ExceptionStatus == InvoiceExceptionStatus.PaidLate) ||
+                   (Status != InvoiceStatus.Invalid && ExceptionStatus == InvoiceExceptionStatus.Marked);
 #pragma warning restore CA1305 // Specify IFormatProvider;
         }
         public override string ToString()
         {
-            return Status + (ExceptionStatus == null ? string.Empty : $" ({ExceptionStatus})");
+            return ToString(Status) + (ExceptionStatus == InvoiceExceptionStatus.None ? string.Empty : $" ({ToString(ExceptionStatus)})");
         }
     }
 
diff --git a/BTCPayServer/Services/Invoices/InvoiceRepository.cs b/BTCPayServer/Services/Invoices/InvoiceRepository.cs
index 0a846f10d..5bbaccb6e 100644
--- a/BTCPayServer/Services/Invoices/InvoiceRepository.cs
+++ b/BTCPayServer/Services/Invoices/InvoiceRepository.cs
@@ -126,7 +126,9 @@ namespace BTCPayServer.Services.Invoices
                     Created = invoice.InvoiceTime,
                     Blob = ToBytes(invoice, null),
                     OrderId = invoice.OrderId,
-                    Status = invoice.Status,
+#pragma warning disable CS0618 // Type or member is obsolete
+                    Status = invoice.StatusString,
+#pragma warning restore CS0618 // Type or member is obsolete
                     ItemCode = invoice.ProductInformation.ItemCode,
                     CustomerEmail = invoice.RefundMail
                 });
@@ -316,15 +318,15 @@ namespace BTCPayServer.Services.Invoices
             });
         }
 
-        public async Task UpdateInvoiceStatus(string invoiceId, string status, string exceptionStatus)
+        public async Task UpdateInvoiceStatus(string invoiceId, InvoiceState invoiceState)
         {
             using (var context = _ContextFactory.CreateContext())
             {
                 var invoiceData = await context.FindAsync<Data.InvoiceData>(invoiceId).ConfigureAwait(false);
                 if (invoiceData == null)
                     return;
-                invoiceData.Status = status;
-                invoiceData.ExceptionStatus = exceptionStatus;
+                invoiceData.Status = InvoiceState.ToString(invoiceState.Status);
+                invoiceData.ExceptionStatus = InvoiceState.ToString(invoiceState.ExceptionStatus);
                 await context.SaveChangesAsync().ConfigureAwait(false);
             }
         }
@@ -385,8 +387,9 @@ namespace BTCPayServer.Services.Invoices
                 return paymentEntity;
             }).ToList();
 #pragma warning restore CS0618
-            entity.ExceptionStatus = invoice.ExceptionStatus;
-            entity.Status = invoice.Status;
+            var state = invoice.GetInvoiceState();
+            entity.ExceptionStatus = state.ExceptionStatus;
+            entity.Status = state.Status;
             entity.RefundMail = invoice.CustomerEmail;
             entity.Refundable = invoice.RefundAddresses.Count != 0;
             if (invoice.HistoricalAddressInvoices != null)
diff --git a/BTCPayServer/Views/Invoice/Invoice.cshtml b/BTCPayServer/Views/Invoice/Invoice.cshtml
index 83310696c..848216821 100644
--- a/BTCPayServer/Views/Invoice/Invoice.cshtml
+++ b/BTCPayServer/Views/Invoice/Invoice.cshtml
@@ -54,6 +54,10 @@
                     <th>Id</th>
                     <td>@Model.Id</td>
                 </tr>
+                <tr>
+                    <th>State</th>
+                    <td>@Model.State</td>
+                </tr>
                 <tr>
                     <th>Created date</th>
                     <td>@Model.CreatedDate.ToBrowserDate()</td>
@@ -70,14 +74,6 @@
                     <th>Transaction speed</th>
                     <td>@Model.TransactionSpeed</td>
                 </tr>
-                <tr>
-                    <th>Status</th>
-                    <td>@Model.Status</td>
-                </tr>
-                <tr>
-                    <th>Status Exception</th>
-                    <td>@Model.StatusException</td>
-                </tr>
                 <tr>
                     <th>Refund email</th>
                     <td><a href="mailto:@Model.RefundEmail">@Model.RefundEmail</a></td>
@@ -221,7 +217,7 @@
                             <th class="text-right">Rate</th>
                             <th class="text-right">Paid</th>
                             <th class="text-right">Due</th>
-                            @if (Model.StatusException == "paidOver")
+                            @if (Model.StatusException == InvoiceExceptionStatus.PaidOver)
                             {
                                 <th class="text-right">Overpaid</th>
                             }
@@ -236,7 +232,7 @@
                                 <td class="text-right">@payment.Rate</td>
                                 <td class="text-right">@payment.Paid</td>
                                 <td class="text-right">@payment.Due</td>
-                                @if (Model.StatusException == "paidOver")
+                                @if (Model.StatusException == InvoiceExceptionStatus.PaidOver)
                                 {
                                     <td class="text-right">@payment.Overpaid</td>
                                 }
diff --git a/BTCPayServer/Views/Invoice/_ViewImports.cshtml b/BTCPayServer/Views/Invoice/_ViewImports.cshtml
new file mode 100644
index 000000000..fbea1e3d7
--- /dev/null
+++ b/BTCPayServer/Views/Invoice/_ViewImports.cshtml
@@ -0,0 +1 @@
+@using BTCPayServer.Services.Invoices